coolent temp sensor 07 tb 4.2 - Page 2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #11  
Old 09-23-2012, 02:52 PM
54inches's Avatar
54inches 54inches is offline
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2007 Chevy TrailBlazer LS
Imperial Blue Metallic 4.2L I6 2WD
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Quote:
Originally Posted by TrailblazrI6 View Post
Not sure where you got those first diagrams but that is not our engine. I found it on the web too at a very generic website and there is NO reference to that going to the 4.2l I6 Atlas engine. The coolant temperature sensor location never changed on the 4.2l engine.

However, your last picture shows the temperature sensor, right above the t-stat, behind the alternator. I can clearly see it. Good luck.
Quote:
Originally Posted by TrailblazrI6 View Post
Its ABOVE that metal round piece. I can see the wire going to it

After this, I would give up working on cars. I dont think its your thing....
I love it when people come on forums with your attitude and I have pictures to prove you are wrong.

RHS is correct, GM changed it to the opposite side of the engine and I have pictures to prove it.

I just change my thermostat and was going to change the temp sensor, but it is too hard to get to and there is beer to drink and football to watch today.

I think after this, you should stfu and stay off forums.

Pictures to come soon.
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  #12  
Old 09-23-2012, 04:08 PM
rhswarrior04 rhswarrior04 is offline
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2007 Chevy TrailBlazer LT
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thanks 54 yea it is where i thought it was and where you say it is the last diagram i posted shows it i also posted a pic in the post of where he thought it was just to show him that it was different i guess some people cant understand that gm or any automaker for that matter changes their designs from time to time i ended up taking it to my local shop because i didnt have the proper tool and didnt want to modify one of my sockets plus it was well worth the $40 bucks the shop charged just to not have to take the time to change it myself and just a heads up if you want to do it yourself at least on mine its a 15mm wrench or if you can find or want to modify a 15mm socket to look like a o2 sensor socket is the easiest way thats what the shop i took it to ended up having to do cause they couldnt get a wrench to it good luck with it
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  #13  
Old 01-04-2013, 09:41 PM
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54inches 54inches is offline
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No worries brother!

Glad it worked out for you.

Cheers,
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  #14  
Old 01-06-2013, 08:45 AM
smoore1903 smoore1903 is offline
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I've been a long time viewer here, but first time poster. This site has saved me countless times already.

I would agree with RHS above, I changed out my thermostat yesterday and was going to change out the ETC sensor at the same time, but did not find it above the thermostat as expected (2006 model year). So, yes, it does appear the location was moved starting in 2006. I think I did find it on the opposite side, left rear corner of the block. Looks very hard to get to, pretty darn close to the firewall and possibly behind the manifold heat shield. I gave up and hope the thermostat solves my P0128 code. 54 inch, if you still have those pics, that would be awesome to see.
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  #15  
Old 01-19-2013, 09:05 PM
richielj richielj is offline
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2006 Chevy TrailBlazer LS
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Quote:
Originally Posted by rhswarrior04 View Post
this is a diagram i found that shows it where i thought it was and a pic to compare that mine is not the same as this one so they obviously did change the sensor location sometime between an 02 and the 07 my question is whats the easiest way to get to it any help would be greatly appreaciated
Thanks for this picture. I found on the 2006 Trailblazer we have it is moved also. Sorry for the expert that didn't help you much because I found the same thing your picture showed the machined area where it was originally and couldn't find the new location. The new location I can't tell what all to take off to replace it so hopefully a new thermostat will cure the engine code issue. I can't see/trace the exact location of the sensor but found the wire plug in and then it goes down out of sight.

Will deal with it if the thermostat doesn't cure the code.
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